/* ============================================================
   University.com.tw — Light-mode shared theme
   Brand: BFE family (magenta + coral) on light background
   ============================================================ */

:root {
  color-scheme: light;

  /* Brand */
  --magenta: #ff0097;
  --magenta-dark: #c4006f;
  --coral: #ff5a3d;
  --brand-gradient: linear-gradient(135deg, #ff0097 0%, #ff5a3d 100%);

  /* Light surface palette */
  --bg: #ffffff;
  --bg-alt: #faf9f5;
  --bg-cream: #f6f4ed;
  --bg-warm: #fefcf7;
  --border: #e8e5dd;
  --border-strong: #cfcabe;

  /* Text */
  --text: #1a1a2a;
  --text-muted: #54545f;
  --text-soft: #7a7a85;

  /* Accents (used sparingly) */
  --navy: #1a3a6e;
  --gold: #b8620e;
  --green: #06af49;

  /* Typography */
  --font-cn: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', system-ui, sans-serif;
  --font-en: 'Inter', 'Helvetica Neue', system-ui, sans-serif;

  /* Spacing scale */
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 56px;
  --space-2xl: 96px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26,26,42,0.06), 0 1px 2px rgba(26,26,42,0.04);
  --shadow-md: 0 4px 14px rgba(26,26,42,0.08), 0 2px 4px rgba(26,26,42,0.04);
  --shadow-lg: 0 10px 30px rgba(26,26,42,0.10), 0 4px 8px rgba(26,26,42,0.05);
  --shadow-brand: 0 8px 24px rgba(255,0,151,0.18);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-cn);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.7;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.2;
}

h1 { font-size: clamp(36px, 5.5vw, 64px); letter-spacing: -0.02em; }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }

p { margin: 0 0 1em 0; color: var(--text); }

a { color: var(--magenta); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--coral); }

img { max-width: 100%; height: auto; display: block; }

/* Containers */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Sections */
.section {
  padding: var(--space-2xl) 0;
}
.section-tight {
  padding: var(--space-xl) 0;
}
.section-cream { background: var(--bg-cream); }
.section-alt { background: var(--bg-alt); }
.section-warm { background: var(--bg-warm); }

/* Tags / Eyebrows */
.eyebrow {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--magenta);
  margin-bottom: var(--space-sm);
}

.flagship-pill {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--brand-gradient);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 0, 151, 0.08);
  color: var(--magenta);
  font-size: 13px;
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
  line-height: 1;
}
.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 0, 151, 0.25);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border-strong);
}
.btn-outline:hover {
  border-color: var(--text);
  color: var(--text);
}
.btn-ghost {
  background: transparent;
  color: var(--magenta);
  padding: 10px 16px;
}
.btn-ghost:hover {
  background: rgba(255, 0, 151, 0.06);
}

/* Cards */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover {
  box-shadow: var(--shadow-md);
}
.card-featured {
  background: linear-gradient(180deg, #fff 0%, #fff5fb 100%);
  border-color: var(--magenta);
  position: relative;
}
.card-featured::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 4px;
  background: var(--brand-gradient);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* Utility */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.grad-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-xl) 0;
}

/* Top nav (shared) */
.uni-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.uni-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1280px;
  margin: 0 auto;
}
.uni-logo {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.uni-logo .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: inline-block;
}
.uni-nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.uni-nav-links a {
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: background 0.15s;
}
.uni-nav-links a:hover {
  background: rgba(255, 0, 151, 0.06);
  color: var(--magenta);
}
.uni-nav-cta {
  background: var(--brand-gradient);
  color: #fff !important;
  padding: 10px 20px !important;
  border-radius: var(--radius-pill);
  font-weight: 700 !important;
}
.uni-nav-cta:hover {
  background: var(--brand-gradient) !important;
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-brand);
}
@media (max-width: 760px) {
  .uni-nav-links a:not(.uni-nav-cta) { display: none; }
}

/* Footer (shared) */
.uni-footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-xl) 0 var(--space-lg);
  font-size: 14px;
}
.uni-footer .container {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
@media (max-width: 760px) {
  .uni-footer .container { grid-template-columns: 1fr; gap: var(--space-lg); }
}
.uni-footer h4 {
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--space-md);
}
.uni-footer a {
  color: rgba(255, 255, 255, 0.7);
  display: block;
  padding: 4px 0;
  font-size: 14px;
}
.uni-footer a:hover { color: #fff; }
.uni-footer-logo {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  margin-bottom: var(--space-sm);
}
.uni-footer-bfe-credit {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding-top: var(--space-md);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
}
.uni-footer-bfe-credit a { display: inline; color: rgba(255,255,255,0.85); }

/* Reveal animation (subtle) */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(10px);
    animation: reveal 0.6s ease-out forwards;
  }
  .reveal-d1 { animation-delay: 0.1s; }
  .reveal-d2 { animation-delay: 0.2s; }
  .reveal-d3 { animation-delay: 0.3s; }
  @keyframes reveal {
    to { opacity: 1; transform: translateY(0); }
  }
}